Period changes in a close binary system with mass and angular momentum loss

The parameters of a close binary system with mass exchange between components and the primary filling its Roche lobe are estimated in the restricted three-body approximation. Gasodynamics of the mass transfer and processes in star interiors depending on it are not considered. It is assumed that the angular momentum of the exchaned matter entering the Roche lobe of the secondary is carried away from the system. The computed mass and momentum losses, the distance between component centers and the orbital period are different from the results obtained previously using another model of the mass transfer. (author)